| From: | Gabriel Muñoz <gabriel(dot)munoz(at)gmail(dot)com> |
|---|---|
| To: | Shams Khan <shams(dot)khan22(at)gmail(dot)com> |
| Cc: | Kevin Grittner <kgrittn(at)mail(dot)com>, pgsql-admin <pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: PostgreSQL Performance Tuning / Postgresql.conf and on OS Level |
| Date: | 2012-12-14 19:32:02 |
| Message-ID: | CAP8pxBYAbBRKRaS47nar6hd9oTZfD0VVaD+dDKc_gHQHr+i2wQ@mail.gmail.com |
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| Lists: | pgsql-admin |
Maybe
explain analyze select count(distinct a.subsno ) from subsexpired a where
a.subsno not in (select b.subsno from subs b where b.subsno>75043 and
b.subsno<=112565) and a.subsno>75043 and a.subsno<=112565;
Give you more information about real excecuting time.
About postgres.conf
checkpoint_segments = 64
Gabriel.
On Fri, Dec 14, 2012 at 4:23 PM, Shams Khan <shams(dot)khan22(at)gmail(dot)com> wrote:
> explain select count(distinct a.subsno ) from subsexpired a where
> a.subsno not in (select b.subsno from subs b where b.subsno>75043 and
> b.subsno<=112565) and a.subsno>75043 and a.subsno<=112565;
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